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check-tcg HOWTO?

From: Claudio Fontana
Subject: check-tcg HOWTO?
Date: Sun, 10 Jan 2021 22:17:44 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0

Hi Alex,

happy new year,

I am trying to get check-tcg to run reliably,
as I am doing some substantial refactoring of tcg cpu operations, so I need to 
verify that TCG is fine.

This is an overall getting started question, is there a how-to on how to use 
check-tcg and how to fix things when things don't go smoothly?

I get different results on different machines for check-tcg, although the runs 
are containerized,
on one machine the tests for aarch64 tcg are SKIPPED completely (so no errors),

on the other machine I get:

qemu-system-aarch64: terminating on signal 15 from pid 18583 (timeout)
qemu-system-aarch64: terminating on signal 15 from pid 18584 (timeout)
qemu-system-aarch64: terminating on signal 15 from pid 18585 (timeout)
make[2]: *** [../Makefile.target:162: run-hello] Error 124
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [../Makefile.target:162: run-pauth-3] Error 124
make[2]: *** [../Makefile.target:162: run-memory] Error 124

Both are configured with 

configure --enable-tcg

Anything more than V=1 to get more output?
How do I debug and get logs and cores out of containers?

in tests/tcg/ there is:

a README (with no hint unfortunately) ,

There are a bunch of variables in these files, which seem to be possible to 
configure, am I expected to set some of those?

I think that it would be beneficial to have either more documentation or more 
immediately actionable information out of make check failures;

Any help you could give me to make some progess?



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